Bone-cutting forceps



Patented oci. 23,1923.

yILLIAIVI L.V SHEARER, OF OMAHA, NEBRASKA, ASSIGNOR TODENTAL PRODUCTSCOM,- f

ILLINOIS,

PANY, OF CHICAGO,

A CORPORATION OF ILLINOIS.

Bonn-CUTTING Fononrs.

ApplicationY filed April 30, 1921. Serial No. 465,716;

T 0 all whom t may concern.'

Be it known that I, WILLIAM L. SHEARER, a citizen of the United States,and resident of Omaha, in the county of Douglas and State of Nebraska,have invented a certain new and useful Improvement in Bone-CuttingForceps, of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawings, forming apart of this VVspecification.

My inventionl relates to bone cutting for oeps of the type used by`dental surgeons. The invention contemplates certain improve ments in theconstruction of the beak of a device of this class and has VFirst theprovision of a bone cutting forceps having an open faced beak whichpermits the operator at all times to see the cutting edges of the eXactamount of bone that will be removed by the operation of the forceps.

Second the provision of a bone cutting forceps having cutting jawswhichare conformed and adapted to prevent vpieces ofV severed bone fromflying through the open face of the forceps. Y

Third the provision Vofra bone cutting forceps having a beak that isvery strong in comparison with its size and vthe amount of metal usedin'its construction'.` Y

In the. accompanying drawing: Figure l is a front elevational Vview-of aY forceps embodying my invention. n.

. Figure 2 is a side elevational view of the same. e' 'Y Figure 3 is afragmentary side elevational view-of one'of the jaws of the device; and

Figure i is a section on line 4 4 of Figure 2. Y Y' j The forcepsillustrated in thel drawing comprises the handles 5 5'and the cuttingjaws 6 6, the jaws being pivoted by the rivet 7. Mylinvention is'concerned solely with the conformation and manner of cooperation of thecutting jaws; hence, the construction of the handles and the means forkits obj ects the device and to determine j dency to fly for vsecuringthe relatively moving parts of the device together may-be ofconventional or any other suitable form. l

The beak formed by the extremities of the cutting jaws 6 6 is preferablyturned forwardly from the plane of the handles and its rear and lateralsurfaces are preferably ycurved Vto a point, as yillustrated in Figuresl and 2. It will be noted that the tip of each of the jaws issubstantially channel shaped in cross section,with the rear side of thechannel longerthan the forward side. The cutting edges 8 8 rear sidesVof thechannels and meet in a plane which intercepts the axis of therivet 7. Since the forward sides of the channels are shorterthan therearsides, there is always a substantial open space betweenthe forward sidesof the channels through which the operator may view the cutting edgesand determine the exact amountof bone which he desires to remove. Thechannel formationv of the. cutting jaws provides recesses 9 9 whichserve to prevent severed bone from being thrown out between the spacedforward sidesof the channels.

,the forceps.

nel shaped cutting jaws. The discomfort to patients and annoyancejtotheoperator which result from the fiymg of severed bone are formed onthe` Sevcred bone naturally tends to fly sidewisein Hence, inpractically all cases Vthe severed bone is thrown into one orV theA,other of the recesses 9 9 and shows no tenthrough the sight openingbe! tween the spaced forwardsides of the chanso,V 1

is practically eliminated by the forceps con-Y l struction herein shownand described.

That I claimis new and'desireto secure.,

V,by LettersPatent of the l. A bone cutting pair of cutting jaws havingopposedtips .that are substantially channel shaped in cross section, therear sides ofthe channel shaped jaw tips Vbeing provided with theforward sides of the jaw tips being shorter than the rear sides- UnitedStates is:

cutting edges,

forceps comprising a thereof, each channel shaped jaw tip affording apocket for -particles of bone, the cutting edges being jaws includingco-operating cutting edges at the rear thereof, said jaws being curvedupwardly and inwardly from said edges to provide pockets to receiveparticles of bone severed by said edges, the upper extremi- Vties ofsaid jaws being spaced apart when 10 said edges are in engagement.

ln witness whereof, hereunto subscribe my name this 25th day of April,1921.

WLLIAM L. SHEARER.

`Witnesses Jnssin R. DAVIS, ALVIN C. AHLBERG.

